Every contraction can be extended to a partial isometry.

每一压缩算子能被扩张成一个部分等距算子.

Let T be a stable isometry of the Abelian Lattie - Ordered group G.

设T是交换格序群G的稳定等距.

In this paper, we show that the isometry between the unit spheres of certain normed space and its dual space can be extended to a real linear isometry on the whole space.

本文证明了在一定条件下赋范线性空间与其共轭空间的单位球面之间的等距算子可以延拓为全空间的实线性等距算子。

This property where one shape can be transformed into another without stretching or crumpling, is called isometry.

这使一个形状可以转变为另一个形状，却不会拉伸或弄皱其原本的特性，这性质叫等距同构。